WordPress Themes list
Theme websites
Use lightweights theme like Blocksy, GeneratePress or Kadence Theme.
The 3 top mega themes – Divi is best for multiple sites Divi vs Avada vs X Theme breaks often)
http://www.organizedthemes.com/themes/
http://www.anarieldesign.com/themes/
http://graphpaperpress.com/themes/
woothemes.com/ – by the maker of the ecommerce plugin
Basic Themes (Free)
ZeroGravity (NZRF)
Responsive Themes
10 most popular free responsive themes reviewed
http://demo.thinkupthemes.com/ $30 each or $85 per annum. used Sentos for LEOT. Have account.